Load-discharging car



A. CAMPBELL LOAD DISCHARGING 0A March 15,1927. I 1,620, 948

Filed Aug. 7. 1925-11- I 5 Sheets-Sheet 1 I 1,620,948 A. CAMPBELL LOADDISCHARGING CAR Filed Aug. 7. 1925 5 Sheets-Sheet 2 March 15 19 27.

A. CAMPBELL LOAD DISCHARGING CAR March 15 1927. 1,620,948 7 Filed Aug.v. 1935 S Sheets-Sheet -s March -15 1927.

A. CAMPBELL LOAD QISCHARGING CAR 5 Sheets-.-Shee t 4 9 Filed Aug. '7.1925 A. CAMPBELL LOAD DISCHARG ING CAR March 15 1927.

Patented Mar. 15, 19.27.

ABGYLE' emvr'rnnnr, or emozieo; rnnrnorsgessrenon ToENTEBEBESE"BA\I1ZWAY EQUIPMENT coax-Pliny, on GHIGAGQ', rrNo-rs; aCORPORATEON or rtnnvors noan nrsorxaieerneoA RQ Application filed August7, 1825 Serial No. 48,797

lily-invention relates to; improvements in load-discharging cars, and insome'respects is an'improvement on the type of car shown in my to-rmer.U. S. Patent No; 1,455,520, dated May 15, 1923. V One object of myinvention is to provide car having large dumping capacity withcomparatively smalldumping door area.

Another object of my inventionis to provide in a car of the level floortype, an arrangement such that,.without materially increasing theheightor the floor above the rails, an. underframe structure or minimumvertical height may be employed and dumping, of substantially the wholeload effected hrough the entire length of the car.

Another object-f the invention is to pro;

vide a, car whereby the various discharge openingsv in the floor of thecar may be safely and conveniently controlled individually fromlocati'onsadjacent the respective (lumping opening.

Other objects of the invention relate to.

certain. features of construction andnovel I combination of parts suchas: will be more l fi llliirly pointedout hereinafter and claimed.

in the drawlngs left-hand portion of the plan. View having thesuperstructure broken away in parts to. better illustrate the underframeand: relation of parts. Figure 2 is a longitudinal, elevational view ofthe car shownin Fig. 1, the" saidyiew being taken on a line correspond-i'ngsubstantially to line 22 of Fig. ,1,

and corresponding substantially to. the section line 4cl,.ot Fig. 1.Fig. 5 is a fractional transverse sectional view taken through the caradjacent the outer end of a door and taken one line correspondingsubstantially to the section line of Fig. 2. Fig. 6 is a fractionallongitudinal'sectional view taken through one of the enddoors andillustrating the, method of support of the same and the end Wall of thecar, said View forming apart of this: specification, Figure 1 Isatopplan View of a dump-car. showing my improvements, the

;ner posts 14', and longitudinally extending being taken on a linecorresponding to line 6-6 ofFig. 1. Fig.7 is a plan Viewv on an enlargedscale of a. sufficient portion of the car to illustrate; one'of thelarge floor doors the said door and flooring certain parts beingbrokenaWayto-better illustrate the construction-o1. the mechanism Fig.Sis a sectional elevatlonal" View taken through Fig. 7 and on-a. linecorresponding substantially to line 8-8 thereof. 9 is'a ver ticaltransverse sectionalview taken through the car'o'n' ahn'e correspondingsubstantially to a line 9-9 of Fig. 7. Fig. 10 is a fractionalsectional'view showing so much of the car as will illustrate the doorlockingmeohincludingside walls A; end walls B 5 center 7 sills C; bodybolsters D;- cross-bea ns E; fixed floori'ng F; trucks G; small dumpingfloor doors H; large dumping doors J; door operating means K for thedoors H; door operating means for the doors J g .and' shaft-rotatingmeans N. y

Referring more particularly to Fig. 2,: it'willbe noted that the sideWalls A of the car are each formed Lot truss construction includingupperi ohord10, lower chord 11,

vertical posts 12, diagonal members 13, corside boards15. Each of theend walls Bincludes a top member 16and lower member '17, end boards18,and a series of horizontal bracing members 19 5-19. The center sills ofthe car include a plurality of flanged beam members 20 20 united Withlongitudinally extending cover plates 21. Each body bolster-D includes aplurality of vertically disposed sect-ions 2222 spaced from each otherand united by'top and bottom cover plates as indicated at 23 and 24respectively and which extend transversely of the car. i

Each crossbeam E' is tormedot' vertically intermediate the center silland side walls of the car, said sections on the opposite sides ofthecenter sill being connected by transversely extending top and bottomcover plates as indicate at 26 and 27, respectively,

the center sills at the cross beams being tions F are alternated withthe dumping openings, there being a 'flxed floorsection, extending fromone, cross member to the other, disposed on the right of each dooropening as viewed by an operator as he faces the car. As shown in Fig.1, the series of dumping openings and fixed floor sections on one sideof the center sill are duplicated on the opposite side of the centersill, the door openings on one side of the center sill beingtransversely aligned with fixed floor sections on the opposite side ofthe center sill, thereby presenting a floor having alternated andstaggered fixed floor sections and dumping openings.

The floor of the car is substantially a level floor and is spacedsomewhat above the underframe, said underframe including the centersill, bolsters and cross beams; a series of longitudinally extendingstringers are interposed in the said space betwen the underframeandfloor as indicated at 29, 30, 31, 32, 33 and 34: respectively. Thestringers 29 and 31 are preferably metallic members of Z-shape and,adapted to sustain the outer edge of the fixed floor sections as well asform suitable members to support the hinge end of the respective dumpingdoors H and J. Said member 29, which extends from the end wall of thecar to the bolster, is spaced outwardly from the center sill of the car,

7 thereby making provision for the hinging of the small doors H, at anappreciable distance from the center sill. 'The doors H, which aredisposed above the trucks, are smaller than the doors placedintermediate the trucks, thereby making it possible to dispose a doorabove the truclr parts which will have sufficient slope when open toshed the lading and sufiicicnt door opening to permit the load totherethrough without unduly increasing the height of the floor.

The relation of the door H, when in opened position, to the parts of thetruck parts G is indicated by dotted lines in Fig. In addition to theirfunction as floor and door supporting members the stringers 29 and 31also serve to brace the underframe hori zontally by bracing the end ofthe car relatively to the bolster and for this purpose each member 130which supports the door in the second panelvfrom the end wall of the Iit is extended beyond the adjacent body bolster and connected to thehorizontal flange of the lower member of the end wall. Intermediate thetrucks, the metallic stringers 31 are also preferably of Z-shape andconnected to the center sill and so disposed that the top flange 340 ofeach Z-member extends outwardly from the center sill and forms a supportfor the overhanging portion of the adjacent fixed floor portion F. Thefixed floor portions F are supported intermediately by the series oflongitudinally extending stringers 32 which preferably consist of woodenbeams respectively supported by the center sills and crossbeams.

The side walls of the car are extended downwardly below the level of thefloor and the horizontal flange 111 of the lower chord member 11 liesagainst and is secured to the tops of the respective cross members. Saidhorizontal flanges beneath the fixed floor sections F carry the floorsupporting stringers 33 and adjacent the free edge of the dumping doorsH and J the said flanges support the stringer members 34 which areformed of suficient depth to bring the upper surface thereofsubstantially in alinen'lent with the upper surface of the fixed floorsec tions F.

' The discharge openings are fitted around the edges thereof withsealing edge plates which overlap the respective doors, said plates atthe side edges of the doors being indicated at 35-35 Secured'in positionby securing means, such as: bolts or rivets indi cated at 350, certainof which extend through the plate, thefloor, and portions of the crossbeam. The front and rear edge plates are indicated at 36 and 37respectively the plates 36 and 37 being secured in position by securingmeans, such as bolts or rivets,indicate'd respectively at360 and 370,the securing means 370 at the rear edge of the door extendlng throughthe plate, the floor, and being secured to one flange of the stringer31,

while the securing means 370 for the plate doors are formed of a seriesof boards 39 extending in the direction of flow of the material when thedoor 18 in an inclined position and nterposed between certain of saidare a plurality of preferably shaped battem to which hinge straps 41;"

are secureda'nd'whereby the door is hingedly mou-nted on the hingebrackets 38. Each door H is braced? transversely to the hinge battens 40by me1nbers'42 and 43 which.

are. preferably of" angle shape and extend across the. plane of saidl'iingebattens 40 and are SBCUI'CltllGIGiO, the member 42 which isdisposed adjacent the free edge of the door being, d'isposed'with theverticalfiange thereof extending upwardly and in the plane of' thedoorihoards and the member 43, which is d i s aosed' adjacent the rear edgeof the door, being disposedwith thevertical flange thereof extendingdownwardly and away from the-door boards. Thei'nner edge of the doorisfitted'with a metallic plate 44 which is formedzof'arcuatefshapeandisadapted to co-operate with tlierear sealinged'ge plate I 31011ihecar to maintain a tightjoint.

The large doors J'. as shown more particularly in Fig; 3zand Figs. 7 to10 inclusive, are each. formed. of a. series of boards 45extendlongitudinally of the car and bracedtransversely thereofhy battens46; the two outer onesbeing preferably of Z-shape. At the hinged edgeofthe door, each said batten is fitted with a hinge strap 47 whereby thedoorisnioiinted on thehinge brackets 38. Adjacent the free edge of'thedoor,ti't is reinforced by a beam member 48" extending across the planeof'the various battens 46 and secured to saidmembers.

The various doors H andJ are adaptedlto beoperated independently of.each other, preferably by means of mechani'sms'a's indicatedat K and Mand which respectively include crank shafts 49 and 50. -The crankshatts: 49" and 50 for. the respective door mechanisms K' and M operatein: the same manner hut differ in thelengths 'ofcranks' and in. methods.of mounting on the car Structure; Said. crank shafts 49' and 50 areadapt ed. to. be rotated and locked'by the rotating means. N; which are:similar in all. main respetqts flconsequentlythe. same; descriptionwillsufiice for both shafts. Each mechanism ht is mounted adjacent afixed bearing 51, tl-irough. which one end of the shaft is extended.FiXedly mountedon said] projecting end of theshaftis a ratchet ;wheel 52having. on, the outer periphery thereof a pl'uralityof external teeth53- with which a.

pivoted weighted locking pawl: 54 is co-operaole; said pawl 54beingadapted to be. locked in positionby a locking. cam. 55, both,

said pawl audio-am. being. pivotally mounted onfthe fixed bearing 51.Said ratchet wheel 'isalso provided,with. a.v fixed lug 56-. with.

which a rotatable, loosely'mounted member 5.7 having. a lug 58, c isadapted to co-operate, to rotate s-aidrat'ohetwheel in eitherdirec Saidmember 5T, which isv formed with d a plurality. of outstanding ful'crumsor prongs 59. adapted-to accommodate there between a removable lever, s'malnta-lned 111" operating relation with. lts corresponding ratchetwheel through themedium ofa'pin' reducing the turning moment on saidhears ings when the crank shafts are 'calle'd to sustain theimp'actofthedoors. p p

The shafts 49,. which are adaptedtor operating'the small doorsadjacent'theholsters ofthe car, are each pivotally supported.at.

one end in a bracket, ttl carried by the crossbeam and the opposite end,of the shaft is extended through the spacedsections 222-2' of thebolster as best indicated in" Figs; 11' and 12 and a bearingGQ'ismounted on the side of' the section nearest'the door-while thebracket bearing 51', heretofore men:-

tioned, is secured to the adiacent'holster section. It wil'lbelnotedthat', d'u'e'to'the stage gered relation of the doors, the arrangementfor supporting'the'shaft brackets on the-op'-- .po'sit'e sides offthe'holster are somewhat ditferent, the hracket'hfa at the extreme endof thecar depending. fro-m'the horizontal flange ofthelower member-1.7 of theend wall instead'of hein secured-to the face of one of the.transversemembers. As indicated in Fig. 13; the crossheam to;which the bracket I61 is secured isislotted as indicated at 64- to permit of the insertionof the shaft 49' therethrough. The shaft 49- is locked in fixed relationto the ca-ri structure by a bolt 65.. p

I Each of'the shafts 50', which s'upport the" 51 and 66 fixedimmediatelv below the lower portions ofthe transversexbeams, saidshaftbeing adapted to contact withthe lower por-L tion of the Z'doorbattens46 through tlielarger doors J, is mo'unted in"fixed bea'ringsw"medium of rollers 6? which: are loose'ly" 'mounted on the said" shaft;Said rollers are formed with elongated slots as indi cated'at 167.Eachlrolleris arraued tohaverotary' section 267 which convertssaidsl'otinto a circular opening, Each said section 267' is maintained in o'ierati've relation with its corresponding roller by means of akey 68,

motion on the .shaftiby the insert-ion' of a the roller beingsecuredagainst longitudinal n movement in one direction by a stirrup 69 whichalso serves to maintain the shaft in fixed relation to the door. Thelower flange of each Z batten is braced to the web of the same, adjacentits engagement with the shaft, by means of a bracket 70.

Longitudinal displacement of the shafts relatively to the supportingbrackets is guarded against by providing arcuate flanges 71 adapted toengage with the cranks throughout the entire range of movement thereof.

Rollers are preferably not used on the shafts 49 in connection with thesmall doors H as it is desired tosecure maximum door opening above thetrucks without material increase of height of the floor from rails andthus by using a door of'smaller extent for the doors above the trucks, Iam enabled to use a lighter door and a shorter crank shaft and stillsecure a greater degree of slope than the larger doors. I

In this connection, it will also be noted that I use the battens 40 aswear plates on the undersides of the doors H, in lifting and loweringthe doors, thus providing a very economical construction, since saidbattens 40 thus perform the double function of battens and wear plates,and'also serve as efiicient means for the attachment of the hinge straps4:1. V r

The arrangement ofastaggered doors to be operated as individual unitsfrom beneath adjacent fixed floor sections is exceedingly convenientfrom an operating view point as portable conveyors may be disposed justbe. neath the respective doors and when the doors are opened and ladingis discharged, it may be conveyed outwardly or upwardly from the cardesired. The crank-shafts move rearwardly beneath the doors during theoperation of the doors and consequently the doors are entirely devoid ofprojections extending beyond the free edges of the doors and which wouldthus normallv prevent the use of conveyors in the manner indicated.

It will further be noted from the preceding description and drawings,that the underframe may be made of comparatively shallow height withoutraising the effective level of the floor to any appreciable degree abovethe rails, while at the same time the side walls of the car aresustained upon the ends of the cross members of the underframc, and thecrossmembers rigidified by the longitudinal stringers. Furthermore, it

7 will be noted that by supporting the floor upon the stringers, airventilationis provided beneath the floor, thus minimizing the tendencyfor moisture to collect, which would accelerate rotting of the boardsand corrosion of the metallic members.

I have herein shown and described what I now consider the preferredmanner of care rying out my invention, but the same is merelyillustrative and I contemplate all the center sill and resting on thesaid trans verse members; and dumping doors hinged to said metallicfloor beams.

2; In a dump car, the combination with center sill, bolsters and crossbeams extending outwardly from said center sill and spaced from eachother; a floor disposed above the said center sills and cross beams,metallic beam members on each side of the.

center sill extending from each end of the car to the adjacent bolster,said beams being disposed outwardly from the center sill of the car;dumping doors forminga portion of the floor, said doors being hinged tosaid longitudinal beam -members; and other dumping doors disposedintermediate said first named doors, said lastnamed doors being hingedadjacent the center sill, the doors on one side of the center sill beingalternated with fixed floor sections on the opposite side of the centersill.

3. In a dump car, thecombination with an underframe including a centersill and cross beams outstanding therefrom; of a floor spaced from saidunderframe; metallic beams interposed between the floor of the car andthe underframe, said metallic beams adjacent the ends of the car beingspaced outwardly from the center sill; and dumping doors hinged to saidmetallic members, said doors on one side of the center sill of the "carbeing alternated with fixed floor sections on the opposite side of thecenter sill. 4. In a railway car, the combination with an underframeincluding centersills and cross members outstanding therefrom, saidcross members being spaced from each other longitudinally of the car; afloor disposed above the said underframe and spaced therefrom;longitudinally extending metallic beam members disposedin the spacebetween said underframe and floor, said beam members at the ends of thecar being spaced outwardly from the center sill of the car; and

doors hinged to said longitudinal beam members, said doors being adaptedto close with their free edges adjacent the side wall of the car. 1 V

5. In a dump car, thecombination with a ,seriesof dump doorsiin theflooralternated with fixed floor sections; of crank IOU mechanisms, pivotallymounted adjacent the doors and each havingaportion thereof disposed;beneath the corresponding door' to supportth'e same in closed positionandoperatingto liftthe door from'open to closed position; andfmeans" foroperating said mechanisms, saidoperatingine'ansheing'dis posed beneaththe adjacent; fixed. floor sections'.

6. In a dump car'havin'g fixedifloor sections alternated with dumpingdoors, each door on' one'side'ofthe car being transversely opposite'afixed floor" section; supporting means for the floors and doorsincludingmetallic stringers carriedby'theiunderframe of the can. saidmetallic stringers; above thetrunks of the car being spa'ced outwardly.fi-onizthe; center sillof the car and said me tallie: stringersintermediatethe trucks be G le 71' In adiimplc al'gthe combination witha side; wall ofthej can; oi a dumping opening adjacent the, side wallof'th'ef car; a door liiiiged on; a longitudinal axis disposed' inwardlyofjfthe side offthe car a fixedi floor section extendingifi'om thehingededge of thedoor to-the'oppositeside wall of'the car;

supportingjmeaiis for the edge of said fixed fibor adjacent" the door,including a longitudinal metallic stringer adapted to also' form ,asupportingjmeansfor the hinge'd'e'dge of'the (lootand other stringers"disposed b'etween: said; metallic" stringer and the side" wallioftheear. '81 In a d ump car having; a series ofdumn ing; openings;,thecombination with an untildihal stringers carried by said under frame;awfi'oor restmgg on the said stringersg',

d fr'ame; of side walls; a series. o'flongiaeach said f dumping-openin'glbeing defined by a stringer. carriedby "the side wall ofthercar'.

and on. the opposite side by a metallic stringer forminggone of thevsuppgn tfs; for. the fiber, said floor adjacent eachsaidi dumping"opening being fbrmedi of a fixed floor section,a fixed floer section ononeside ofthe car beihgstaggered in, relation to that on theoppositeside ot the can; and a'dumpingQ door. for each dumping openinghingedly I mounted onthe adjacent metallic strijngerf l 9;; dump-car,the combination with anflimderframe; 0f a flanged beam member disposedabove said u-nderframe andicarnied" thereby;- a floor disposed abovesaid beam member; a. dumping; door hinged; toysaidi beam. member; and asealingtedge plate can ri'edQ-by the-floor and extendingfovei. thedoors; and securing means extending through said sealing; edge plate;the floor and one-of the; flanges; of the beammember.

I01 In a dump car liavingan underfi'amei t and a fixed floordisposedabove said underL- i fram anaispaced ther fiom;-.a e w riingiiateve seid uaderfsame nd". in l dihe a lower chord member having ahorizontally disposed flange; a stringer caiiied "b' r' said flange,said stringer{havingits upper surtface sub'sta'n-tiall'y level; with;the upperstir facepfi the fixed fi'eor, a' dumping opening intermediatethe side wall of the car and fixed floor", said door being adapted to'close with its free edge" adj acent theside-wall of the'car; and edgeplat-es respectively carried by said fixed floor and said stringencarried 'a-metallicrstringer. adj-'aeent'the edge o i-"the bythe=- sidewall member, said edge plates being adapted toover-l'ap at the cornersof 7 the dumping opening; 1

11. In a dump car, the combination wi-th an underframe; ofa' stringerdisposed above the i 'said underirame; said st r-ingen being the form ofa Z having an outstanding flange; a floor carried by said outstandingflange of the" stringer; an edge plate carried by the-=-floor andextending outwardly beyond the same; securing means extendingthrough-said-ed'ge plate, the'fieor ofthe car, and the top-flange of the3 stringer and a dumping door" disposed beneath the edge plateandipivotall'y mounted to saidi stringer; e 12: lira -dumpcartheo'ombination' with theside wallioffthe -car; of an n'nder-frameinclii-dingcenter sill andcross'beams E SGI lES of dumping-"doorsdisposed in-the Home of the car; each said door b'ei-ng hinged adjfacent aiixe'd floor section, said fiXed floor section extending fromthe side wall of the car across the plane of the: centen' sill; and a'metal lic I stringer forming supporting means for the ina rginal edgeoflthe fixed floor and the 'hiingedi end of the' doom said stringerbeing carried bythe o'entersill -135'I n= a: dump" car,thecombi'nationwith the trucks of the, car-2; of a fiired floor-h avinga "plu'r ality? of door op'enings forme d? thereinon opposite sides ofthecenter oi the car,

some of said openings beingdisposed abeve the trucks and? some of theopenings intermediatethesa id trucks'ghinged doors adapted to close:said openings, the; doors above'the swinging movement thanthoseinteiqnediate th'e trncks; saidl series ofdooi-s' from one end 'ofthe'car' tothe other beingalternated with trucks being adapted to have agreater fixed floor sections 7 ancl "so"- arranged that" the doors on;one si-deo'i the center a r-c trans- 7 vens'ely alined with fi xedfleoi' sections on the lee each of said openings, each said door beinghinged to one of said floor supporting stringers. i

15. In a dump car, the combination with an underframe; of a floordisposed above said underframe and spaced therefrom; a dumping openingin the floor of the car; 'a side wall having a lower chord member incontact with the underframe a stringer carried by said lower chordmember and adapted to have its upper surface substantially level withthe upper surface of the floor; edge plates carried by said floor andstringer, said edge plates being adapted to project in the space of thedoor opening; and a dumping door disposed beneath said edge plates.

16. Ina dump car having sides and ends; an underframe including alongitudinal center sill and cross members extending outwardlytherefrom, said cross members being spaced from each other to form aseries of 'disposed intermediate a pair of cross members, said doorsbeing disposed in each alternate panel formed between the cross members, each door on one side of the center sill being transversely alinedwith a fixed floor section on the opposite side of thecenter sill, eachsaid door being hinged to one of the stringer members.

17. Ina dump car, the combination with the trucks; ofvfiooring disposedabove said trucks; dumping doors disposed in the said flooring above thetrucks and also intermediately of the said trucks; crank arms foroperating said doors independently of each other, the cranks operatingthe doors above the trucks being of shorter length than those operatingthe doors intermediately of the trucks.

18. In a dump car having a series of panels in the floor thereof definedby a series of i transversely extending cross beams spaced from eachother; dumping doors disposed in each saidalternate panel; fixed floorsec-V tions disposed in the respective panels intermediate the doors;door raising and locking mechanisms for each of said doors, said meansbeing pivotally mounted adjacent the side edges of the doors; andactuatingmeans for the said door mechanisms mounted at the end-of eachof said doors and beneath the adjacent fixed floor sections.

19. In a dump car having a substantially fiat floor, the, combinationwith the side walls and end walls of the car; of a series of dumpingopenlngs arranged longitudinally of the car, said dumping openings beingarranged in staggered relation withfixed floor sections; means forraising each of said doors independently of each other, each. said meansincluding a crank shaft pivotally mounted adjacent each end of therespective doors; and means at one end of each shaft for imparting amovement of rotation to the said crank shaft, each said means beingdisposed beneath the fixed floor section adja of the car to swing on alongitudinally extending axis; a crank arm pivotally mounted at one endupon the bolster and at the other end on the end wall of the car, saidcrank arm having shaft rotating means on the end of the shaft adjacent'the bolster and clutch mechanism interposed between said shaftrotating means and .the crank arm.

21. In a dump car. having a substantially flat floor, the combinationwith the trucks thereof; of dumping doors disposed above the trucks andalso intermediate of the said trucks; individual operating meanspermitting independent operation of any of said doors, each said meansincluding a crank arm adapted to form a support for its door in both itsopen and closed positions and also operating as a raising means for thedoor,

the door mechanisms above the trucks being formed to provide for alesser opening for the corresponding door as compared with the doorsintermediate said trucks.

22. In a dump car, the combination with a substantially level floor; oftrucks near each end of said car; a longitudinal center sill; crossbeams extending outwardly from the said'center sill; a series of dumpingdoors disposed at intervals throughout the length of the car, some ofsaid doors being disposed above the trucks and others intermediately ofthe trucks, said intermediate doors being adapted to have a greateramount of opening than those above the trucks; and mechanisms forindividually operating each door independently of any of the otherdoors, said mechanisms including crank arms pivotally mounted adjacentthe side edgesof the doors, the crank arms for the intermediate doorsbeing provided with roller means intermediate the crank arms and thedoors and the mechanism for the doors above the trucks being adapted todirectly engage the doors without the interposition of rollers.

23. In a dump car having side and end walls, an underframe including alongitudi nal center sill and body bolsters outstanding from the endWall of the car to the bodybolster, said stringer being disposedoutwardly from the center ill; a dumping door hingedly mounted uponsaidstringer and adapted to close with its free edge adjacent the car sideWall; raising and lowering means for the said door including a crankshaft pivotally mounted in supports disposed at the respective sideedges of the door, one of said supports for the crank shaft dependingfrom the end Wall of the car and the other support being mounted uponthe body bol- 1 ster, said crank shaft having one end thereof extendedinwardly through the spaced sections of the bolsters; shaft rotatingmeans disposed on the crank shaft inwardly of the support on the bodybolster, said shaft rotating means including 'a fixed member rigidlyunited With thecrank shaft and a loosely mounted member adapted to wantWith said fixed member after a predetermined degree of free movement. I

In Witness that I clalm the foregoing I have hereunto subscribed my namethis 3rd day of August, 1925. V

' ARGYLE CAMPBELL.

